51842237 has 4 divisors (see below), whose sum is σ = 51856800. Its totient is φ = 51827676.

The previous prime is 51842221. The next prime is 51842239. The reversal of 51842237 is 73224815.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 51842237 - 2⁴ = 51842221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51842239) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2018 + ... + 10380.

It is an arithmetic number, because the mean of its divisors is an integer number (12964200).

Almost surely, 2^51842237 is an apocalyptic number.

It is an amenable number.

51842237 is a deficient number, since it is larger than the sum of its proper divisors (14563).

51842237 is an equidigital number, since it uses as much as digits as its factorization.

51842237 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14562.

The product of its digits is 13440, while the sum is 32.

The square root of 51842237 is about 7200.1553455464. The cubic root of 51842237 is about 372.8732639700.

The spelling of 51842237 in words is "fifty-one million, eight hundred forty-two thousand, two hundred thirty-seven".